What is the Motor Duty System? What do S1, S2, S4 Mean?

The working system of the motor is the description of the load capacity of the motor, including the continuous time and sequence of the stages of startup, load, electric brake, no-load, and power-off stop. The working system is divided into 10 categories from S1 to S10:

1) Continuous duty system---S1. The motor is under constant load, and the movement time is sufficient to achieve thermal stability.

2) Short-time working system---S2. Under constant load, operate according to the timing. This time is not enough for the motor to reach thermal stability, and then the power is cut off and stopped for a sufficient time, so that the difference between the temperature of the motor cooling medium and the re-cooling is within 2K.

3) Intermittent cycle work system---S3. It operates on a series of identical duty cycles, each week consisting of a period of constant load operation and a period of de-energized transfer. With such a working system, the starting current per cycle will not have a significant impact on the temperature rise.

4) Including the start-up intermittent synchronous work system---S4. Runs on a series of identical duty cycles, each week including the time when the start-up temperature is significantly affected, the time when running at constant load, and the time when power is cut off.

5) Intermittent cycle work system including electric braking---S5. Operates on a series of identical duty cycles, each week including start-up time, constant-load operation time, rapid electric braking time, and power-off time.

6) Continuous cycle working system---S6. It operates according to a series of identical working cycles, each cycle includes a period of no-load operation and a period of constant load operation, and there is no power-off stop time.

7) Continuous cycle duty including electric braking---S7. According to a series of identical work cycles, each week includes start-up time, electric braking time, constant load operation time, etc., and stops the transfer without interruption.

8) Including the continuous cycle duty system with corresponding changes of load and rotational speed---S8. It operates according to a series of identical working cycles, each cycle includes one or several sections of constant load running time at different speeds and a constant load running time at a predetermined speed, with no energy interruption and stop time.

9) The load and rotational speed are aperiodically varied work system---S9. Speed and load are within the permissible range as aperiodic changes. This work regime involves frequent overloads, values that can far exceed benchmark loads.

10) Discrete constant load working system---S10. Including not less than 4 kinds of discrete load values (or equivalent loads) working system, each load operation time should be long enough for the motor to reach thermal stability, and the minimum load value can be zero in one working cycle.